IS12722:1989 Indian Standard (Reaffirmed 2005) TEXTILE FLOOR COYERINGSDETERMINATION OF FLAME RESISTANCE BY TABLET TEST ma 9Tws UDC 677.643 : 677.014'27 : [ 543.873 ] rg BIS 1990 BUREAU MANAK OF UHAVAN, INDIAN STANDARDS ZAFAK 9 BAHADUR SHAH NEW DETJII 110002 MARG April 1990 Price Group 2 Chemical Methods of Test Sectional Committee, TDC 5 FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards on 31 July 1989, after the draft finalized by the Chemical Methods of Test Sectional Committee had been approved by the Textile Division Council. Besides the conventional textile floor coverings manufactured from wool, silk jute, etc, these are now Their flammability increasingly being manufactured utilizing blends containing man-made fibres. depends upon the constituent fibres, exposure conditions during actual use and the nature of flame The floor coverings are normally subjected to various treatruents, retardant treatment imparted. such as shampooing, dry-cleaning, washing and hot water extraction cleaning during actual use. Since the type of such treat`1 he Same retardant finish is required to withstand these treatments. ments vary considerably depending upon the end use, it is recommended that the type and number of such treatments may be as agreed to between the buyer and the seller. While `Textile assistance has been preparing this standard, considerable floor coverings-Burning behaviour - Tablet test at ambient International Organization for Standardization ( IS0 ). derived from IS0 tXQ5-l!Jci2 temperature', issued by the In reporting the results of a test or analysis made in accordance with this standard, if the final value, observed or calculated, is to be rounded off, it shall be done in accordance with IS `2 : 1960 `Rules for rounding off numerical values ( r&std )`. IS 12722 : 1989 Indian Standard TEXTILE FLOOR COVERINGSDETERMINATION OF FLAME RESISTANCE BY TABLET TEST 1 SCOPE 1.1 This standard prescribes a method for the determination of f-lame resistance of textile floor coverings in a horizontal position when exposed to a small source of ignition under controlled laboratory conditions. 4 APPARATUS 4.1 Test Box 1.2 The metliocl is applicable to all types of textile floor coverings irrespective of their COIIStruction or their fibre composition. The method may also be applicable to unfinished material. 1.3 The results obtained on specimens in a horizontal position, as specified in this standard, do not apply to the behaviour of the textile floor covering when used in another position, particularly in a vertical position. should be used solely to assess NO-rE - The method the properties of materials or systems in response to heat and Ilame under controlled laboratory conditions and should not be used for the evaluation or regulation of the hazard of textile floor coverings under actual fire conditions. The method has been used extensively in the trade for acceptance testing and is considered satisfactory as a test for acceptance of merchandise, provided that an appropriate sampling plan such as given IS 7877 ( Part I ) : 1978. Methods of sampling and tests for hand made carpets: Part 1 Sampling and selection of areas of physical tests, is used. A test box with inside dimensions of 300 x 300 x 300 mm and made from hard, fire resistant insulation board with similar thermal properties to asbestos cement board, not less than 6 mm thick. The chamber is open at the top and has a flat removable base made of the same material as above. The joints shall be air tight. NOTE - Any other results may be used. test chamber giving identical 4.2 Square Metal Plate The square metal plate shall be of size 230 x 230 mm, 6.5 & 0.5 mm thick, with a 206 mm diameter hole cut in the centre of the plate. 4.3 Desiccator(s) The desiccator shall be required for storing the rnethenamine tablets ( set 5.1 ) and the bone dry specimens ( see 6.4.2 ). It is recommended that self-indicating silica gel is used as desiccant. 4.4 Circulating Air Oven forced draught at 105 f and 2"C 2 REFERENCES 2.1 The adjuncts fallowing Indian to this standard. Standards Title Methods textiles. for conditioning of are necessary The oven shall be ventilated, thermostatically controlled throughout the enclosure. 4.5 Glove, disposable, pylene or rubber. 4.6 Rule, graduated cleaner of polyethylene, in mm. polypro- IS No. IS 6359 : 1971 1s 11471 : 1986 4.7 Vacuum Method for determination of dimensional changes due to the effects of varied water and heat conditions for machinemade carpets. Method for determination of colour fastness of textile floorcoverings to shampooing. A vacuum cleaner of which all surfaces in coutact with the specimen are flat and smooth, shall be required. 4.8 Laboratory Fume Hood IS I 1969 : 1986 3 PRINCIPLE 3.1 A posed small under maged specimen of textile floor covering is exin a horizontal position to the action of a ( methenamine tablet ) ignition source specified conditions and the resulting dalength is measured. 1 Laboratory fume hood of about 2 ms capacity, capable of being closed and having its draught turned off during the test shall be required. The front or one of the sides of the hood shall be of glass in order to permit observation of the specimen during the test. 4.9 Timing Requirement Device of timing device will be optional. IS 12722I 1989 5 REAGENTS 5.1 Methenamine Tablet 8 PROCEDURE 8.1 Carry out the test in an atmosphere having d temperature between 15 and 35°C and a relative: humidity between 20 and 70 percent. 8.2 Place the test chamber ( 4.1 ) in the labora. the ventilation turntory fume hood ( 4.8 ) with ed off. 8.3 Remove a specimen from the conditioning atmosphere or desiccator according to the method of conditioning chosen in ( 6.4 ) with a gloved hand and, if there is a pile, brush it in a direction opposite to the lay to bring the pile to an upright position. 8.4 Place the specimen flat on the floor of the test box with the use surface uppermost, ensuring the specimen is horizontal. Place the metal plate ( 4.2 ) on top of the specimen, and line up the outside edges of the plate with those of the specimen. 8.5 Place a methenamine tablet ( 5.1 ) flat and in the centre of the specimen and ignite the tablet with a lighted match which shall only lightly touch the upper face of the tablet. If `used, start the timing device ( 4.9 ). Do not touch the specimen with the lighted match. 8.5.1 If more than 2 minutes elapses between removal of the specimen from the conditioning atmosphere or the desiccator and ignition of the tablet, repeat the procedure specified in 8.1 to Close the 8.5 with a new conditioned specimen. fume cupboard. 8.5.2 If the tablet cracks upon ignition, the test result void. consider 5.1.1 Tablets of hexamethylenetetramine, flat, having a mass of 150 f 5 mg and a diameter of 6 mm. NOTE - Storage of the tablets in a desiccator the tendency to crack upon ignition. reduces 6 PREPARATION 6.1 Sampling OF TEST SPECIMENS 6.1.1 Sampling of specimens shall be carried out in accordance with IS 7877 ( Part 1 ) : 1978. 6.2 Dimensions and Number each 230 f 6.2.1 Cut at least eight specimens, 3 mm square, from each sample. 6.3 Underlays 6.3.1 The use of an underlay is not specified. However, subject to agreement between the interested parties, this method can be used to assess the effect of an underlay in combination with a textile floor covering. 6.4 Conditioning of Test Specimens 6.4.1 Clean each specimen with the vacuum cleaner ( 4.7 ) until the pile is free from fluff or loose ends of yarn, fibres, etc. 6.4.2 Condition the test specimens in a manner that will permit free air circulation so that they are not resting upon one another, in one of the following ways, or as agreed between the interested parties: a) In the standard atmosphere of 27 & 2°C and 65 f 2 percent relative humidity in accordance with IS 6359 : 1971, or b) By drying the specimens in the oven ( 4.4) at 105 f 2°C for 2 hours, removing the specimens from the oven with a gloved hand ( see 4.5 ) and placing the specimens immediately in the desiccator ( 4.3 ) for at least 1 hour, until they reach ambient temperature. The use of bone dry specimens may be more at However, it may be that 65 percent relative humidity. use of specimens conditioned at 65 percent relative humidity is more realistic. Performance requirements should be set accordingly. stringent 8.6 Allow the ignition flame or any propagated flame to burn until extinction or until the flame or glowing reaches the edges of the hole in the metal plate. Terminate the test when either of the above conditions is reached. Stop the timing device, if used. Start the ventilation in the fume hood to eliminate any volatile products of combustion. 8.7 After each specimen has been tested, lift the: removable base from the test chamber and fret it of any residue which would prevent the next specimen from lying in a horizontal plane. Allow sufficient time between each test for the test chamber to cool to ambient temperature f5"C. 8.8 Repeat the procedure on each specimen. specified in 8.3 to 8.7 NOTE - than the use of specimens conditioned 7 DURABILITY TREATMENT OF FLAME RETARDANT 7.1 For checking the durability of flame retardant treatment applied to the textile floor-coverings, the type and number of treatments for shampooing, dry-cleaning, washing and/or hot water extraction cleaning, etc shall be as per the agreement between the buyer and the seller ( see also IS 11471 : 1985 and IS 11969 : 1986 ). L 8.9 On each specimen measure, to the nearest mm, the maximum distance between the centrr of the specimen and the edge of the damaged zone using the rule ( 4.6 ). IS 12722 I 1999 8.10 If required, measure the time in seconds from the ignition of the tablet to the moment when the flame or glowing reaches the edge of the hole in the metal plate, using the timing device ( 4.9 ). 9 EXPRESSION 9.1 The obtained 10 TEST OF RESULTS the value b) Whether a separate underlay rated in the test ( see 6.3 ). c) The conditioning atmosphere test specimens ( see 6.4 ). tl) For each specimen, the as determined in 8.9. e) If required, the measured according shall include the following f) was incorpoused for the length damaged results of the test shall be for each specimen ( se8 8.9 ). REPORT flame spread to ( 8.10 ). time in this to Ilave 10.1 The test report information: a) A statement of the sampling plan used. 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